Systems, methods, and instrumentalities are disclosed for a wireless transmit/receive unit (WTRU) to determine rank, offset, or inter-stream interference control information, for example, which may be associated with uplink MIMO operations. A method to control a WTRU may include receiving a special E-RNTI that is associated with a channel. The channel may be associated with a rank indication. The channel may be an E-AGCH-like channel. The channel may have a similar encoding structure as an E-AGCH. The channel may be an E-ROCH. The channel may be received, and it may be determined that the channel is associated with the special E-RNTI. At least one of a rank or an offset may be determined, and the WTRU may be configured with the determined rank or offset. An inter-stream interference (ISI) offset may be received, for example, via RRC signaling, and may be applied to an uplink transmission of a primary stream.
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1. A method to control a wireless transmit receive unit (WTRU), the method comprising: receiving an enhanced radio network temporary identifier (E-RNTI) and a special E-RNTI, wherein the E-RNTI is associated with an enhanced absolute grant channel (E-AGCH) and the special E-RNTI is associated with an enhanced rank and offset channel (E-ROCH), the E-ROCH comprising a rank indication; receiving the E-ROCH; determining that the E-ROCH is associated with the special E-RNTI; and determining a rank based on the rank indication, wherein the rank indication indicates a maximum allowable number of multiple-input and multiple-output (MIMO) layers for transmission.
A method controls a wireless device (WTRU) using two identifiers: a standard identifier (E-RNTI) for a grant channel (E-AGCH), and a special identifier (special E-RNTI) for a new channel called an enhanced rank and offset channel (E-ROCH). The E-ROCH includes information indicating the maximum number of MIMO layers the WTRU can use for transmission. The WTRU receives the E-ROCH, verifies it's associated with the special E-RNTI, and determines its maximum allowed MIMO rank based on the information within the E-ROCH. This allows the network to dynamically control the MIMO configuration of the WTRU.
2. The method of claim 1 , wherein encoding of the E-ROCH is related to E-AGCH encoding.
The method to control a wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank, uses an encoding scheme for the E-ROCH that is related to the encoding used for the enhanced absolute grant channel (E-AGCH). This means the design and implementation of the E-ROCH encoder/decoder can leverage existing E-AGCH encoder/decoder components, simplifying the overall system design.
3. The method of claim 2 , wherein the E-ROCH has the same encoding chain as an E-AGCH.
The method to control a wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank and the encoding of the E-ROCH is related to that of the E-AGCH, the E-ROCH's encoding process is *identical* to the E-AGCH's. The E-ROCH reuses the same encoding chain. This further simplifies implementation as it eliminates the need for a separate encoding/decoding process specifically for the E-ROCH.
4. The method of claim 1 , wherein determining that the E-ROCH is associated with the special E-RNTI comprises decoding the E-ROCH.
The method to control a wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank, determines the E-ROCH is associated with the special E-RNTI by decoding the received E-ROCH data. The successful decoding of the channel data, by implication using the correct special E-RNTI, confirms that the received information is indeed the E-ROCH intended for that specific WTRU.
5. The method of claim 1 , wherein determining that the E-ROCH is associated with the special E-RNTI comprises: decoding the E-ROCH, performing a cyclic redundancy check (CRC) on the decoded E-ROCH utilizing the special E-RNTI, and determining that the E-ROCH is associated with the special E-RNTI.
The method to control a wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank, determines that the E-ROCH is associated with the special E-RNTI by decoding the E-ROCH data, then performs a Cyclic Redundancy Check (CRC) using the special E-RNTI as the key. Only if the CRC check is successful, meaning no errors are detected when using the special E-RNTI, does the WTRU conclude that the received channel is indeed the intended E-ROCH.
6. The method of claim 1 , further comprising: determining an offset; and determining a transport block size of a secondary stream of a dual-stream transmission using the offset.
The method to control a wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank, further determines an offset value. This offset is then used to calculate the transport block size (TBS) for the secondary stream in a dual-stream transmission. The offset provides a means for the network to control the data rate and resource allocation for the secondary stream based on channel conditions or other network parameters.
7. The method of claim 6 , further comprising: determining a transport block size of a secondary stream of a dual-stream transmission using the offset.
The method to control a wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank, and also determines an offset and a transport block size of a secondary stream of a dual-stream transmission using the offset, repeats the determination of the transport block size using the offset. This likely refers to a redundant calculation or verification step to ensure the transport block size is correctly determined, or it might be referring to two different secondary streams.
8. The method of claim 1 , further comprising configuring the WTRU with the determined rank.
The method to control a wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank, then configures the WTRU with the determined rank. This step involves setting internal parameters and configurations within the WTRU's communication stack, enforcing the maximum number of MIMO layers it's allowed to use for subsequent transmissions, optimizing resource allocation and avoiding excessive interference.
9. The method of claim 1 , further comprising receiving an inter-stream interference (ISI) offset.
The method to control a wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank, also receives an inter-stream interference (ISI) offset. This ISI offset represents a correction factor that accounts for interference between the multiple data streams transmitted in MIMO, allowing the WTRU to compensate for this interference in its signal processing.
10. The method of claim 9 , wherein the ISI offset is received via radio resource control (RRC) signaling.
The method to control a wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank and receives an inter-stream interference (ISI) offset, receives the ISI offset through radio resource control (RRC) signaling. RRC signaling is a higher-layer communication protocol used to configure various parameters of the wireless connection; therefore, the ISI offset is configured semi-statically or dynamically based on network conditions.
11. The method of claim 9 , further comprising applying the ISI offset to an uplink transmission of a primary stream of a dual-stream transmission.
A method for wireless communication involves mitigating inter-symbol interference (ISI) in a dual-stream transmission system. The method includes determining an ISI offset based on a channel response of a secondary stream in a dual-stream transmission, where the secondary stream is transmitted with a different timing offset relative to a primary stream. The ISI offset is then applied to an uplink transmission of the primary stream to reduce interference caused by the secondary stream. This approach compensates for timing misalignment between the two streams, improving signal integrity and reception quality. The method is particularly useful in multi-stream communication systems where precise synchronization is challenging, such as in wireless networks with multiple antennas or users. By dynamically adjusting the ISI offset, the system can adapt to varying channel conditions and minimize performance degradation due to ISI. The technique enhances reliability and throughput in high-speed data transmissions.
12. A wireless transmit receive unit (WTRU) comprising: a processor configured to: receive an enhanced radio network temporary identifier (E-RNTI) and a special E-RNTI, wherein the E-RNTI is associated with an enhanced absolute grant channel (E-AGCH) and the special E-RNTI is associated with an enhanced rank and offset channel (E-ROCH), the E-ROCH comprising a rank indication; receive the E-ROCH; determine that the E-ROCH is associated with the special E-RNTI; and determine a rank based on the rank indication, wherein the rank indication indicates a maximum allowable number of multiple-imput and multiple-output (MIMO) layers for transmission.
A wireless device (WTRU) contains a processor. The processor receives two identifiers: a standard identifier (E-RNTI) for a grant channel (E-AGCH), and a special identifier (special E-RNTI) for a new channel called an enhanced rank and offset channel (E-ROCH). The E-ROCH includes information indicating the maximum number of MIMO layers the WTRU can use for transmission. The processor receives the E-ROCH, verifies it's associated with the special E-RNTI, and determines its maximum allowed MIMO rank based on the information within the E-ROCH. This allows the network to dynamically control the MIMO configuration of the WTRU.
13. The WTRU of claim 12 , wherein encoding of the E-ROCH is related to E-AGCH encoding.
The wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank, uses an encoding scheme for the E-ROCH that is related to the encoding used for the enhanced absolute grant channel (E-AGCH). This means the design and implementation of the E-ROCH encoder/decoder can leverage existing E-AGCH encoder/decoder components, simplifying the overall system design.
14. The WTRU of claim 13 , wherein the E-ROCH has the same encoding chain as an E-AGCH.
The wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank and the encoding of the E-ROCH is related to that of the E-AGCH, the E-ROCH's encoding process is *identical* to the E-AGCH's. The E-ROCH reuses the same encoding chain. This further simplifies implementation as it eliminates the need for a separate encoding/decoding process specifically for the E-ROCH.
15. The WTRU of claim 12 , wherein the processor is configured to decode the E-ROCH to determine that the E-ROCH is associated with the special E-RNTI.
The wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank, determines the E-ROCH is associated with the special E-RNTI by decoding the received E-ROCH data. The successful decoding of the channel data, by implication using the correct special E-RNTI, confirms that the received information is indeed the E-ROCH intended for that specific WTRU.
16. The WTRU of claim 12 , wherein to determine that the E-ROCH is associated with the special E-RNTI, the processor is configured to: decode the E-ROCH, perform a cyclic redundancy check (CRC) on the decoded E-ROCH utilizing the special E-RNTI, and determine that the E-ROCH is associated with the special E-RNTI.
The wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank, determines that the E-ROCH is associated with the special E-RNTI by decoding the E-ROCH data, then performs a Cyclic Redundancy Check (CRC) using the special E-RNTI as the key. Only if the CRC check is successful, meaning no errors are detected when using the special E-RNTI, does the WTRU conclude that the received channel is indeed the intended E-ROCH.
17. The WTRU of claim 12 , wherein the processor is further configured to determine an offset, and determine a transport block size of a secondary stream of a dual-stream transmission using the offset.
The wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank, further determines an offset value. This offset is then used to calculate the transport block size (TBS) for the secondary stream in a dual-stream transmission. The offset provides a means for the network to control the data rate and resource allocation for the secondary stream based on channel conditions or other network parameters.
18. The WTRU of claim 17 , wherein the processor is further configured to determine a transport block size of a secondary stream of a dual-stream transmission using the offset.
The wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank, and also determines an offset and a transport block size of a secondary stream of a dual-stream transmission using the offset, repeats the determination of the transport block size using the offset. This likely refers to a redundant calculation or verification step to ensure the transport block size is correctly determined, or it might be referring to two different secondary streams.
19. The WTRU of claim 12 , wherein the processor is further configured to configure the WTRU with the determined rank.
The wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank, then configures the WTRU with the determined rank. This step involves setting internal parameters and configurations within the WTRU's communication stack, enforcing the maximum number of MIMO layers it's allowed to use for subsequent transmissions, optimizing resource allocation and avoiding excessive interference.
20. The WTRU of claim 12 , wherein the processor is further configured to receive an inter-stream interference (ISI) offset.
The wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank, also receives an inter-stream interference (ISI) offset. This ISI offset represents a correction factor that accounts for interference between the multiple data streams transmitted in MIMO, allowing the WTRU to compensate for this interference in its signal processing.
21. The WTRU of claim 20 , wherein the ISI offset is received via RRC signaling.
The wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank and receives an inter-stream interference (ISI) offset, receives the ISI offset through radio resource control (RRC) signaling. RRC signaling is a higher-layer communication protocol used to configure various parameters of the wireless connection; therefore, the ISI offset is configured semi-statically or dynamically based on network conditions.
22. The WTRU of claim 20 , wherein the processor is further configured to apply the ISI offset to an uplink transmission of a primary stream of a dual-stream transmission.
The wireless device (WTRU) as described where the WTRU receives an enhanced rank and offset channel (E-ROCH) to determine its maximum allowed MIMO rank and receives an inter-stream interference (ISI) offset, then applies the ISI offset to the uplink transmission of the primary stream in a dual-stream transmission. The WTRU adjusts its transmit power or signal processing for the primary stream based on the ISI offset to mitigate the impact of interference from the secondary stream on the primary stream's signal quality.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
January 28, 2013
August 15, 2017
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